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Combined Science — Biology Flashcards

6 cards from real O-LEVEL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Combined Science — Biology flashcards as text

  1. What is the role of DNA in cells?

    Answer: To carry genetic information and instructions for protein synthesis

    DNA (deoxyribonucleic acid) carries genetic information in its base sequence, providing instructions for making proteins and controlling cell activities.

  2. Which type of muscle is found in the heart?

    Answer: Cardiac muscle

    The heart is made of cardiac muscle, which is involuntary (contracts without conscious thought), highly resistant to fatigue, and contracts rhythmically.

  3. What is the process by which unspecialised cells develop into specialised cells?

    Answer: Differentiation

    Cell differentiation is the process by which an unspecialised cell (e.g., stem cell) develops into a specialised cell with a specific structure and function.

  4. Which macronutrient is the body's preferred source of energy?

    Answer: Carbohydrates

    Carbohydrates (especially glucose) are the body's preferred and most efficiently used source of energy. They are broken down during respiration.

  5. What is the name of the blood vessel that carries oxygenated blood away from the heart?

    Answer: Aorta

    The aorta is the largest artery in the body, carrying oxygenated blood from the left ventricle of the heart to the rest of the body.

  6. What is meant by the term 'homeostasis'?

    Answer: The maintenance of a stable internal environment

    Homeostasis is the process by which the body maintains a stable internal environment (e.g., temperature, blood glucose, water balance) despite external changes.

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  1. file.go.gov.sg — Retake policy · verified Nov 2026
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